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onsemi ESD7951ST5G
- Part No.:
- ESD7951ST5G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-923
- Datasheet:
-
ESD7951ST5G.pdf
- Description:
- TVS DIODE 5VWM 12.9VC SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:600
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Product details
Overview
ESD7951ST5G from onsemi is a bi-directional ultra-low-capacitance ESD protection diode in SOD-923 package, featuring 0.5 pF capacitance, 5.0 V stand-off voltage, and 12.9 V clamping voltage at 1 A peak pulse current - designed for high-speed USB 2.0 and antenna line protection in space-constrained portable electronics.
For engineers reviewing the ESD7951ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include IEC61000-4-2 Level 4 compliance (±8 kV contact / ±15 kV air), sub-1 ns response time, low leakage (<1.0 µA), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The ESD7951ST5G is a bi-directional transient voltage suppression diode optimized for signal-line ESD protection without degrading high-frequency integrity. Its 0.5 pF capacitance at 0 V and 1 MHz ensures minimal signal distortion in 480 Mbps USB 2.0 channels, while its 12.9 V clamping voltage limits stress on downstream ICs during ±8 kV IEC61000-4-2 events.
It operates with a 5.0 V working peak reverse voltage and exhibits <1.0 µA reverse leakage at VRWM, enabling compatibility with 3.3 V and 5 V logic interfaces. The device uses a silicon avalanche structure with fast junction response (<1.0 ns typical) and meets MSL 1 reflow requirements up to 260°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitance | 0.5 pF at 0 V, 1 MHz - preserves signal integrity in USB 2.0 high-speed (480 Mbps) data lines |
| Clamping Voltage | 12.9 V at IPP = 1 A - limits transient overvoltage seen by protected ICs during ESD strikes |
| Stand-off Voltage | 5.0 V - supports 3.3 V and 5 V I/O rails without leakage-induced false triggering |
| ESD Rating | IEC61000-4-2 Level 4: ±8 kV contact, ±15 kV air - certified for end-equipment compliance testing |
| Response Time | <1.0 ns typical - activates before sensitive transceivers experience damaging voltage overshoot |
| Leakage Current | <1.0 µA at 5.0 V - avoids DC loading of low-power sensor or RF front-end circuits |
| Package | SOD-923 (1.00 × 0.60 × 0.37 mm) - enables placement directly at connector entry points in ultra-thin PCBs |
Pinout & Package
SOD-923 surface-mount package: 0.039″ × 0.024″ (1.00 mm × 0.60 mm) body, 0.016″ (0.4 mm) height, matte tin lead finish, MSL 1 rated, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to protected line; forms anode-to-cathode path for negative transients |
| 2 | Anode | Connected to protected line; forms cathode-to-anode path for positive transients - enables bi-directional clamping |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.5 pF enables use on >480 Mbps differential data lines without signal degradation |
| Bi-directional clamping | Protects against both positive and negative ESD pulses without requiring external polarity configuration |
| AEC-Q101 qualified | Validated for automotive infotainment and telematics modules requiring extended temperature and reliability assurance |
| MSL 1 reflow rating | Withstands 260°C peak soldering temperature - compatible with standard high-volume SMT assembly |
Applications
| USB 2.0 High-Speed Interface | Cellular Antenna Feed Line |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports in smartphones and tablets from user-hand ESD events. IC Role / Device Role / Timing Role: Bi-directional transient voltage suppressor placed immediately adjacent to USB connector. Use Value: 0.5 pF capacitance prevents signal rise-time degradation, maintaining eye diagram integrity at 480 Mbps. | Use Scenario: Shielding LTE/5G antenna feed lines from electrostatic discharge induced by housing contact or SIM card insertion. IC Role / Device Role / Timing Role: Low-capacitance shunt protector between RF trace and ground, preserving impedance matching. Use Value: 12.9 V clamping voltage prevents damage to LNA input stages while adding negligible insertion loss. |
| Automotive Infotainment Display Port | Wearable Device Touch Interface |
Use Scenario: Safeguarding MIPI D-PHY lanes connecting display controllers to TFT panels in automotive dashboards. IC Role / Device Role / Timing Role: ESD clamp integrated into compact FPC routing near display connector. Use Value: AEC-Q101 qualification ensures operation across −40°C to +125°C junction temperature range. | Use Scenario: Protecting capacitive touch sensor I/O pins on smartwatches and fitness bands from finger-tip ESD. IC Role / Device Role / Timing Role: Ultra-small footprint protector placed at touch controller GPIOs. Use Value: Sub-1 ns response time intercepts ESD before touch IC internal ESD structures activate, reducing failure risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD9B5.0ST5G | Same SOD-923 package, 0.5 pF capacitance, but unidirectional; 5.0 V VRWM, 14.5 V VC @ 1 A | Requires separate anode/cathode routing; not suitable for AC-coupled or bidirectional signal lines | Select only when protecting DC-biased single-ended lines with known polarity |
| TPD2E001DRYR | 0.8 pF capacitance, 5.5 V VRWM, 12 V VC @ 1 A, dual-channel in SOT-553 | Larger footprint (2.0 × 1.25 mm); higher capacitance limits use to ≤100 Mbps interfaces | Prefer when dual-line protection is needed and board space allows larger package |
Compared with ESD9B5.0ST5G and TPD2E001DRYR, the ESD7951ST5G uniquely delivers bi-directional protection in the smallest industry-standard footprint with lowest capacitance - critical for high-speed, space-constrained designs where polarity is undefined or alternating.
Availability
ESD7951ST5G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, cellular antenna line safeguarding, and automotive infotainment display port hardening requiring stable component supply and long-term lifecycle support.
Supply support for ESD7951ST5G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The ESD7951ST5G belongs to onsemi's high-frequency ESD protection diode product line, engineered specifically for preserving signal fidelity in high-speed digital and RF interfaces while meeting stringent automotive and portable electronics reliability standards.
FAQ
What is the maximum clamping voltage of the ESD7951ST5G under IEC61000-4-2 surge conditions?
The ESD7951ST5G has a maximum clamping voltage of 12.9 V at 1 A peak pulse current per IEC61000-4-2 waveform. This value is measured across the device terminals during standardized ESD events and ensures downstream ICs remain within safe operating voltage margins. The clamping performance is validated using oscilloscope screenshots per Application Note AND8307/D, and applies directly to the ESD7951ST5G in its SOD-923 package.
Is the ESD7951ST5G suitable for protecting USB 2.0 high-speed differential pairs?
Yes, the ESD7951ST5G is explicitly designed for USB 2.0 high-speed (480 Mbps) protection. Its 0.5 pF capacitance minimizes signal distortion and maintains eye diagram integrity, while its bi-directional architecture accommodates the AC-coupled nature of D+ and D− lines. The device is referenced in onsemi documentation for this exact use case, and its SOD-923 footprint allows placement directly at the USB connector.
Does the ESD7951ST5G meet automotive qualification standards?
Yes, the ESD7951ST5G is AEC-Q101 qualified and PPAP capable. It is rated for junction temperatures from −55°C to +125°C and meets MSL 1 reflow requirements up to 260°C. These qualifications confirm its suitability for automotive infotainment, telematics, and ADAS subsystems where reliability under thermal and mechanical stress is mandatory - a key differentiator of the ESD7951ST5G versus generic ESD diodes.
What is the polarity configuration of the ESD7951ST5G and how does it affect circuit layout?
The ESD7951ST5G is a bi-directional device with Pin 1 marked as cathode and Pin 2 as anode, enabling symmetrical clamping for both positive and negative transients. Unlike unidirectional diodes, it requires no orientation-specific routing - both pins connect identically to the protected line and ground. This simplifies layout in AC-coupled paths such as USB or antenna lines, and eliminates risk of misplacement during assembly - a verified design advantage of the ESD7951ST5G.
How does the 0.5 pF capacitance of the ESD7951ST5G impact high-frequency RF applications?
The 0.5 pF capacitance of the ESD7951ST5G introduces negligible impedance change at cellular and Wi-Fi frequencies (700 MHz–6 GHz), preserving antenna VSWR and insertion loss. Measured data confirms <0.05 dB additional loss at 2.4 GHz, making it suitable for LTE/5G antenna feed line protection. This low parasitic value is a core specification of the ESD7951ST5G and is validated per IEC61000-4-2 test conditions in the official datasheet.
ESD7951ST5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SOD-923
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 5.4V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 0.5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-923
ESD7951ST5G FAQ
1.How can I place an order for ESD7951ST5G through Aetrix?
Please submit a Request for Quotation (RFQ) for ESD7951ST5G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ESD7951ST5G reliable?
The price and inventory of ESD7951ST5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESD7951ST5G is usually 5 days.
3.What payment methods are accepted for ESD7951ST5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESD7951ST5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESD7951ST5G?
ESD7951ST5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESD7951ST5G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ESD7951ST5G?
For technical support, including ESD7951ST5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESD7951ST5G requirements.
6.How does Aetrix verify that ESD7951ST5G is sourced from the original manufacturer or authorized distributors?
All ESD7951ST5G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ESD7951ST5G meets industry standards.
7.What is the process for return or replacement of ESD7951ST5G?
All ESD7951ST5G units undergo pre-shipment inspection (PSI). If there is an issue with ESD7951ST5G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ESD7951ST5G part is unused and in its original packaging.
Return procedure for ESD7951ST5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESD7951ST5G Tags
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ESD5Z3.3T1G
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D5V0P1B2LP-7B
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ESD5Z5.0T1G
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DESD5V0U1BB-7
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D12V0L1B2LP-7B
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PESD2V0Y1BSFYL
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